Oogenesis and Sexual Maturation in Meretrix Lusoria (Röding 1798) (Bivalvia: Veneridae) in Western Korea

Chung, Ee‐Yung

doi:10.2983/0730-8000(2007)26[71:oasmim]2.0.co;2

Cited by 43 publications

(24 citation statements)

References 12 publications

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“…Our results agree with the studies done in the Mediterranean Sea, i.e. Metaxatos (2004) and Pérez-Larruscain et al (2011), finding bigger sizes which are in the size range of other venerid species (Mouëza et al 1999, Chung 2007, Popović et al 2013. The differences observed in the size of oocytes from Atlantic and Mediterranean smooth clam populations were related by Moura et al (2008) to the tissue sample state (preserved or fixed) and also to genetic differences.…”

Section: Discussionsupporting

confidence: 92%

Reproduction and size at first maturity in a Mediterranean exploited <em>Callista chione</em> bivalve bed

et al. 2015

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Summary:The smooth clam Callista chione is an Atlantic-Mediterranean species that is commercially exploited in several European countries. Several aspects of its reproduction were studied in a coastal location of the northwestern Mediterranean as a tool for sustainable fisheries management. Gonadal development was classified into 6 different stages, ranging from immature to degradation of the remaining sexual structures. Results showed that C. chione was able to reproduce throughout the year but a main spawning period occurred in spring. First records of hermaphrodites were found for this species. The mature spermatozoa measured 4. Keywords: gonads; first maturity; hermaphroditism; Veneridae; commercial mollusks. Reproducción y talla de primera madurez en un banco de Callista chione explotado en el MediterráneoResumen: La concha fina Callista chione es una especie atlántico-mediterránea comercialmente explotada en distintos paí-ses europeos. Se estudiaron varios aspectos de su reproducción en una localidad costera del noroeste Mediterráneo como herramienta para la gestión sostenible de su pesquería. El desarrollo gonadal se clasificó en 6 estadios distintos, que engloban desde individuos inmaduros a la degradación de las estructuras sexuales remanentes. Los resultados mostraron que C. chione se podía reproducir durante todo el año con un periodo de máxima puesta en primavera. Se observaron hermafroditas de esta especie por primera vez. Los espermatozoos maduros midieron 4.70±0.66 µm (sin el flagelo) incluyendo un corto acrosoma de 0.75±0.09 µm. La pieza media de los espermatozoos estaba compuesta por 5 mitocondrias. Los ovocitos maduros median entre 60-80 µm de longitud. La talla de primera maduración (SL 50

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Section: Discussionsupporting

confidence: 92%

Reproduction and size at first maturity in a Mediterranean exploited <em>Callista chione</em> bivalve bed

et al. 2015

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“…In this study, the same phenomenone was observed as that shown in M. edulis (Pipe, 1987) and M. lusoria (Chung, 2007). Therefore, it is suggested that the follicle cells, which are attached to the oolemma of the oocyte, play a role in the formation of the microvilli on the oolemma (Pipe, 1987).…”

Section: Vitellogenesis In the Oocyte And The Functions Of Follicle Csupporting

confidence: 64%

“…However, it is assumed that the follicle cells, which are attached to degenerated oocytes, presumably have a lysosomal system for breakdown of ingested material, and they might be involved in the induction of oocyte degeneration, and might also resorb various degenerating phagosomes (lysosomes) in the cytoplasm for nutrient storage (such as lipid droplets) during oocyte degeneration, as seen in M. lusoria (Chung, 2007).…”

Section: Functions Of Follicle Cells Attached To the Oocytementioning

confidence: 99%

Oogenesis and Oocyte Degeneration in Coecella chinensis (Bivalvia: Mesodesmatidae)

Kim¹,

Chung²

2014

The Korean Journal of Malacology

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Ultrastructural studies of oogenesis in oocytes, oocyte degeneration associated with the follicle cells in female Coecella chinensis were investigated for clams collected from Namhae, Geongsangnam-do, Korea. In this study, vitellogenesis during oogenesis in the oocytes occured by way of endogenous autosynthesis and exogenous heterosynthesis. Of two processes of vitellogenesis during oogenesis, the process of endogenous autosynthesis involved the combined activity of the Golgi complex, mitochondria and rough endoplasmic reticulum. whereas the process of exogenous heterosynthesis involved endocytotic incorporation of extraovarian precursors at the basal region of the oolema of the early vitellogenic oocytes prior to the formation of the vitelline coat. It is assumed that the follicle cells were involved in the development of previtellogenic and early vitellogenic oocytes and appear to play an integral role in vitellogenesis in the early and late vitellogenic oocytes by endocytosis of yolk precursors, and also they were involved in oocyte degeneration by assimilating products originating from the degenerated oocytes, thus allowed the transfer of york precursors needed for vitellogenesis (through phagocytosis by phagolysosomes after spawning). Follicle cells presumably have a lysosomal system for breakdown products of oocyte degeneration. and for reabsorption of various phagosomes (phagolysosomes) in the cytoplasm for nutrient storage during the period of oocyte degeneration.

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“…At this developmental stage, several coated vesicles appeared through endocytosis, and were present at the basal region of the oolemma in early vitellogenic oocytes. In particular, the uptake of nutritive materials (extrafollicular nutritive materials) in coated vesicles occurred through the formation of coated pits on the oolemma during vitellogenesis (Chung 2007). In this study, heterosynthesis occurred through the incorporation of extrafollicular precursors into oocytes by endocytosis prior to the formation of the vitelline envelope.…”

Section: Vitellogenesis In Oocytesmentioning

confidence: 71%

“…The general ovary morphology of P. (N.) jedoensis is similar to that of other bivalves (Chung et al 2005Chung 2007Chung , 2008. The ovary is irregularly arranged from the subregions of the mid-intestinal glands in the visceral cavity to reticular connective tissues of the foot.…”

Section: Position and Morphology Of The Ovarymentioning

confidence: 73%

Ultrastructural studies of vitellogenesis in oocytes and follicle cells during oogenesis in femaleProtothaca(Notochione)jedoensis(Bivalvia: Veneridae)

Kang

Choi

Jiang

et al. 2010

Animal Cells and Systems

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Ultrastructural studies of vitellogenesis in oocytes and follicle cells during oogenesis in female Protothaca (Notochione) jedoensis were investigated by histological and transmission electron microscope observations. In early vitellogenic oocytes, combined activities of the Golgi complex, mitochondria and rough endoplasmic reticulum in the cytoplasm are associated with autosynthetic vitellogenesis. Furthermore, at this time, many coated vesicles at the basal region of the oolemma of the oocyte lead to the formation of vesicles through endocytosis in the cytoplasm. Through the formation of the coated pits on oolemma during vitellogenesis, the uptake of extrafollicular precursors (nutritive materials) occurs in coated vesicles by endocytosis. Therefore, it is assumed that these exogenous materials are involved in heterosynthetic vitellogenesis. During late oogenesis, exogenous yolk precursors (yolk granules), lipid droplets and proteinaceous yolk granules are present in the cytoplasm of late vitellogenic oocytes. In mature oocytes, small yolk granules appear intermingled and form large mature yolk granules. Thus, two processes of vitellogenesis occur in oocytes by way of endogenous autosynthesis and exogenous heterosynthesis. The follicle cells attached to the oocytes appear to play an integral role in vitellogenesis in this study.

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Oogenesis and Sexual Maturation in Meretrix Lusoria (Röding 1798) (Bivalvia: Veneridae) in Western Korea

Cited by 43 publications

References 12 publications

Reproduction and size at first maturity in a Mediterranean exploited <em>Callista chione</em> bivalve bed

Reproduction and size at first maturity in a Mediterranean exploited <em>Callista chione</em> bivalve bed

Oogenesis and Oocyte Degeneration in Coecella chinensis (Bivalvia: Mesodesmatidae)

Ultrastructural studies of vitellogenesis in oocytes and follicle cells during oogenesis in femaleProtothaca(Notochione)jedoensis(Bivalvia: Veneridae)

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